Condenser



Sept. 14 1926.

A. TOELLE counqusma Filed Oct. 13. 1922 w QQW y a i U v R N Patented Sept. 14, 1926. i 1,599,853

UNITED STATES PATENT OFFICE.

AUGUST TOELLE, OF ANDERSON, INDIANA, ASSIGNOR TO GENERAL MOTORS COR- PORATION, OF ANDERSON, INDIANA, A CORPORATION OF DELAWARE.

CON DENSE: '1-

Application filed October 13, 1922. Serial No. 594,227.

This invention relates to condensers and plication of F. C. Kroeger and Harry E. 50 the manufacture thereof and includes cer- Norviel, Serial No. 578.513. filed July 29 I tain improvements in the type of condenser 1929, with the right end ot' the core threadshown in the eopending application of ed onto the driving center X of the wind- Charles E. Wilson and Harry E. Norviel. ing spindle and the reduced end 21 support- Serial No. 576,933, filed July 24, 1922. ed by the idle center Y of the windingma- 55 More specifically it is an object of the inchin-e indicated diagrammatically in Fig. 7. vention to provide improved means for se The core 20 is rotated as indicated by the curing terminals without soldering to a conarrows in Figs. 7 and 8 to wind'thereon two denser of the type wherein the condenser strips of foil 24 and 25 separated by paper foil and insulating material are wound in insulation 26 and 27. Each layer of insu- B0 compact fashion about a central core. One lation 20. 27, comprises two or more superof the objects is to provide a metal core imposed strips of thin paper each strip be about which the condenser material is wound 'ing preterablr .0005 of an inch thick. The and to make this core serve as one of the foil is preferably .0005 of an inch thick. The

condenser terminals. material is wound on the core under 30 to 65' Other and further objects of the present 40 pounds pressure applied through roller invention will be apparent from the follow- Z (see Figs. 7 and '8), to form a compact ing description, reference being had to the cylinder with the left margin of the foil accompanying drawings, wherein a preextendingover tliei'lett margin of the ferred embodiment of the present invention paper, and with the right margin ot'dthe 70 is clearly shown. foil 24 extending over the right margin of In the drawings: the paper, as shown in Fig. 2. F ig. 1 is a side view of completed 0011- The method of windingon the condenser denser mounted upon a support, drawn to material strips is as tollows,:

full size; A few turns of the foil strip 24 are first 75 Fig. 2 is a longitudinal sectional view of wound directly onto the metal core 20 so the condenser on a four to one scale; that this core may provide an electrical con- Figs. 3 and 4 are end views on a two to nection for this foil strip. Then a few one scale showing steps in the manufacture turns of the insulating layer 26 are wound of thecondenser; onto the core 20 while the winding on of 0 Fig. 5 is a side view (drawn on a two to strip 24 continues. Then the foil strip 25 one scale) of a condenser end disc shown in, and the layer 27 are started onto the core section at the left-hand end of Fig. 2; with the foil strip 25 next to the layer 26,

Fig. 6 is a side view (drawn on a two to care being taken that the end of strip 25 is one scale) of a condenser end disc shown in spaced from the strip 24. The core 25 is 5 section at the right-hand end of Fig. 2; and rotated to wind on all of the material si- Figs. 7 and 8 are sectional and end views, multaneously until a certain number of respectively, showing diagrammatically turns of material are applied. The conmechanism for supporting the core during denser material foil and paper strips are the. winding operation, and the pressure unwound from supply rolls during this proc- 9 roller. ess, and these strips are maintained in a A brass or other metal core 20 is protaut condition and with the planes of these vided with a reduced end 21 and with a counstrips as near parallel to the axis of the core terbore to provide an annular flange 22 (inas possible so-;as to minimize wrinkling of dicated in original shape by dotted lines). the material strips as they are wound onto and with a tapped hole 23. This core is the core. The roller Z tends to iron out any mounted in a condenser winding machine wrinkles which may occur and to reduce the of the type disclosed in the copending apair space between the layers of material so as to obtain compactness without detriment to the condenser material. The strip 2-1 is severed close up to the core and the other strips an inch or two from the core, so that, when the ends of the strips are wound on, the outer end of strip 24 will be spaced from the outer end of strip 25 and safelyinsulated'theretrom by the insulating strips 26 and 27. A few turns of wrapping paper 28 are wound about the core 20, to bring the condenser roll up a certain diameter and the loose end'of this paper 28 is pasted down. The paper 28 extends beyond the right margin of foil 2% to assist in providing insulation of foil 24 from the condenser case.

After the wrapping paper 28 has been wound on and the loose end pasted down. the condenser is placed within the condenser casing tube or can 30 which has first been formed of a metal sheet bent into the shape 30 shown in endelevation in Fig. 3. The cylindrical portion of the can 30 is pressed snugly around the condenser as shown in Fig. 4. and the edge 31 is crimped over the edge 32 by means of a suitable tool such as is shown in the copending application of Wilson and Norviel referred to. The seam of the can 30 is soldered and the condenser is impregnated with wax by processes which are generally known to those skilled in the art.

The condenser is now ready for adding ends to the condenser can 30 and for providing suitable terminals.

The condenser casing end disc 35 of metal is provided with a square opening 36 to receive the squared shank 37 of a threaded stud 38. lVhen the stud 38 is riveted to the end disc 35, the stud cannot be turned with respect to the disc. The disc 35 is provided with radially disposed sharp ridges 39.

The condenser end disc 10 of metal is provided with a center opening ll through which the core 20 may extend, and with a plurality of points 42.

The method of assembling the condenser can 30 end members is as follows The disc 40 is placed over the core 20 with the points 22 projecting inwardly as shown, and the disc 40 mashes down the overhang ing edge. of the foil 2%. The nonconducting washer 43, the condenser casing end 44, non conducting washer 45 and metal washer 46 are applied in the order shown. Then the right end of the core is pressed against a stationary partby a spinning tool applied to the flange 22 so as to spin this flange over the washer 46 as shown at 48. The left end of core 20 is preferably pressed against a block having a socket to receive the reduced end 21. The can end is soldered to can 30.

The disc 35 is pressed into the overhanging ed e of foil 25 as shown with the ridges 39 pro ecting into the mass of mashed foil.

The can edge 47 is crimped over the disc and soldered thereto. "The condenser is now ready for mounting upon a suitable support.

While spaces are shown between the end discs and the margins of the foils for sake of clearness of illustration, it should be understood that there are practically no spaces, because the end discs mash the foil into substantially a solid mass.

Itis apparentthatthe core 20 is insulated from the condenser casing and that the two condenser foils havebeen electrically connected to the core and casing respectively without the use of solder and wires; or terminal strips or such devices that are apt to jar loose inservice.

The condenser is one having two spirally disposed foils, the 'spiral'turns of each foil being integral with. a mass-of oil; material. Each condenserfoil is like a metallic button having extending therefrom and formed integrally therewith a spiral skirt. Therefore a good electric connection with all parts of the foil strips can be had simply by pressure engagement of the 'foil and the discs 35 and -10.

One method of mountingthe condenser is shown in Fig. 1. A suitable nonconducting base 50 is provided with brackets 51 and 52.

VA screw 53 passesthrough an aperture in racket 52 and engages the tapped hole 23 in core 20, and secures a terminal clip 54. The stud 38 projects through an aperture in bracket 51, and a nut 55 is turned down on the stud 38 to secure the condenser in position and to secure a terminal clip 56. Other ways of mounting the condenser and R011!- ing conductors thereto will be readily apparent to those skilled in the art. One other method is disclosed in the copending application of F. C. Kroeger, Serial No. 599,238, filed Nov. 6, 1922.

\Vhile the form of mechanism herein shown and described constitutes a preferred form of embodiment of the invention, it is to be understood that other forms might be adopted, all comingwithin'the scope of the claims which follow.

What I claim is as follows:

1. In a condenser the combination with two coiled insulated foil strips; of a metallic core upon which the layers of foil and insulation are directly wound, said core being in electrical contact with the inside turn of one foil strip; a cylindrical casing surrounding the foil strips; an end cover for said casing insulated from the core but held by the core against the casing; and an opposite end cover held by the casing in direct contact with theside edge of the'second condenser foil strip.

2. An electrical condenser comprisin a core having layers of two insulated Toil strips wound directlythereupon this forming a cylindrical body, a metallic cylindrical casing for said cylindrical body, an end cover for said casing held clamped against said casing by said core, an ofposite end cover for said casing held in p ace by said casing, one of said end covers bein in electrical contact with one foil strip an serving as the terminal therefor, and said core being in electrical Contact with the other of said foil strips and serving as the terminal therefor.

Intestimony whereof I hereto affix my signature.

AUGUST-TOELLE. 

